Instructional Video and Medical Student Surgical Knot-Tying Proficiency: Randomized Controlled Trial.

BACKGROUND: Many senior medical students lack simple surgical and procedural skills such as knot tying. OBJECTIVE: The aim of this study was to determine whether viewing a Web-based expert knot-tying training video, in addition to the standard third-year medical student curriculum, will result in more proficient surgical knot tying. METHODS: At the start of their obstetrics and gynecology clerkship, 45 students were videotaped tying surgical knots for 2 minutes using a board model. Two blinded female pelvic medicine and reconstructive surgery physicians evaluated proficiency with a standard checklist (score range 0-16) and anchored scoring scale (range 0-20); higher numbers represent better skill. Students were then randomized to either (1) expert video (n=26) or (2) nonvideo (n=24) groups. The video group was provided unlimited access to an expert knot-tying instructional video. At the completion of the clerkship, students were again videotaped and evaluated. RESULTS: At initial evaluation, preclerkship cumulative scores (range 0-36) on the standard checklist and anchored scale were not significantly different between the nonvideo and video groups (mean 20.3, SD 7.1 vs mean 20.2, SD 9.2, P=.90, respectively). Postclerkship scores improved in both the nonvideo and video groups (mean 28.4, SD 5.4, P<.001 and mean 28.7, SD 6.5, P=.004, respectively). Increased knot board practice was significantly correlated with higher postclerkship scores on the knot-tying task, but only in the video group (r=.47, P<.05). CONCLUSIONS: The addition of a Web-based expert instructional video to a standard curriculum, coupled with knot board practice, appears to have a positive impact on medical student knot-tying proficiency.

In vivo estimation of perineal body properties using ultrasound quasistatic elastography in nulliparous women.

OBJECTIVE: The perineal body must undergo a remarkable transformation during pregnancy to accommodate an estimated stretch ratio of over 3.3 in order to permit vaginal delivery of the fetal head. Yet measurements of perineal body elastic properties are lacking in vivo, whether in the pregnant or non-pregnant state. The objective of this study, therefore, was to develop a method for measuring perineal body elastic modulus and to test its feasibility in young nulliparous women. METHODS: An UltraSONIX RP500 ultrasound system was equipped with elastography software. Approximately 1 Hz free-hand sinusoidal compression loading of the perineum was used to measure the relative stiffness of the perineal body compared to that of a custom reference standoff pad with a modulus of 36.7 kPa. Measurements were made in 20 healthy nulliparous women. Four subjects were invited back for second and third visits to evaluate within- and between-visit repeatability using the coefficient of variation. RESULTS: The mean ± SD elastic compression modulus of the perineal body was 28.9 ± 4.7 kPa. Within- and between-visit repeatability averaged 3.4% and 8.3%, respectively. CONCLUSION: Ultrasound elastography using a standoff pad reference provides a valid method for evaluating the elastic modulus of the perineal body in living women.

Urinary incontinence symptoms during and after pregnancy in continent and incontinent primiparas.

OBJECTIVE: Examine patterns of urinary incontinence during and after pregnancy, as recalled by incontinent and continent primiparas. STUDY DESIGN: Primiparous women reporting no pre-pregnancy incontinence, were recruited 6 to 9 months postpartum. Those reporting current continence and demonstrating a negative stress test were considered "Primiparous Continent" (PC, n=64). Those reporting current incontinence and demonstrating a positive stress test were considered "Primiparous Incontinent" (PI, n=57). Subjects self-administered a questionnaire recalling leakage during and after pregnancy. RESULTS: Sixteen percent of PC women leaked during pregnancy. Of these, 70% experienced frequent leakage during pregnancy. Seventy-eight percent of PI women leaked both during and after pregnancy. Several patterns arose surrounding leakage frequency for PI women: 19% only leaked frequently during pregnancy, 4% only leaked frequently after pregnancy, and 51% leaked frequently both during and after pregnancy. CONCLUSION: Nearly five times as many primiparous incontinent women, compared with primiparous continent women, leaked during pregnancy.